solve what equation?
and "neither not history" is just gibberish.
Did you draw a Venn diagram?
since 20-1 = 19 students study something,
19 - (12+4) = 3 study both subjects.
So 4+3 = 7 study History
In the class of 20 pupils there are 12 pupils who study English but not history,4 pupils who study history but not English and 1 who studies neither not history.How many pupils in the class study history to solve this equation
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